I got this tire pump last weekend for 50 cents . Marked US ORD . It wasn't pumping air very good , so I put a few drops of Power Steering fluid in the oil hole , it has the rubber seal conditioner in it .
Now it works great .
Those pumps were issued for a number of US Army WW2 vehicles. I have the identical pump in my 1943 Ford GPW (jeep). It is stowed beneath the rear seat. It is a cool find, but I will tell you that they are fairly common.